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Boric acid

Name: Boric acid
Brand: SIGALD
Price: 208 USD
Availability: InStock

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., buffer substance, ≥99.8%

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Pack Size	Availability	Price
500 g	Available to ship TODAYfromMILWAUKEE	$208.00
1 kg	Available to ship TODAYfromMILWAUKEE	$231.00
6 x 500 g	Estimated to ship onJune 09, 2026fromMILWAUKEE	$435.00
2.5 kg	Available to ship TODAYfromMILWAUKEE	$464.00

About This Item

Linear Formula:

H₃BO₃

CAS Number:

10043-35-3

Molecular Weight:

61.83

PubChem Substance ID:

329753669

eCl@ss:

38120104

UNSPSC Code:

12352106

NACRES:

NA.21

EC Number:

233-139-2

MDL number:

MFCD00011337

Assay:

≥99.8%

Form:

powder or crystals

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Properties

Quality Segment

200

agency

USP/NF, reag. ISO, reag. Ph. Eur.

vapor pressure

2.6 mmHg ( 20 °C)

grade

ACS reagent, puriss. p.a.

assay

≥99.8%

form

powder or crystals

impurities

≤0.005% insoluble in methanol, ≤0.05% with methanol-HCl non-volat. matter

pH

3.6-4.0 (20 °C, 4%)

mp

160 °C (dec.) (lit.)

solubility

water: soluble

density

1.440 g/cm³

anion traces

chloride (Cl^-): ≤3 mg/kg, phosphate (PO₄^3-): ≤5 mg/kg, sulfate (SO₄^2-): ≤5 mg/kg

cation traces

As: ≤5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤1 mg/kg, Mg: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg

SMILES string

OB(O)O

InChI

1S/BH3O3/c2-1(3)4/h2-4H

InChI key

KGBXLFKZBHKPEV-UHFFFAOYSA-N

Description

General description

Boric acid can be used as a Lewis acid catalyst in organic synthesis to facilitate various organic reactions, including dehydration, hydrolysis, decarboxylation, and condensation reactions. It produces different borate anions and salts and can react with alcohols to produce borate esters. It is also used as a buffering agent and pH adjuster.

Boric acid is a very weak acid, having pH in the range of 3.6-4.0. Coulometric method for the determination of boric acid has been reported.

Application

Boric acid can be used as a precursor to synthesize boron carbon oxynitride thin films by the atmospheric pressure chemical vapor deposition (APCVD) method using carbon-rich methane and nitrogen-rich ammonia.

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Show Differences

1 of 1

This Item	B0394	B0252	B7901
Sigma-Aldrich 31146 Boric acid	Sigma-Aldrich B0394 Boric acid	Sigma-Aldrich B0252 Boric acid	Sigma-Aldrich B7901 Boric acid
grade ACS reagent, puriss. p.a.	grade ACS reagent	grade -	grade electrophoresis grade
assay ≥99.8%	assay ≥99.5%	assay ≥99.5%	assay ≥99.5%
agency USP/NF, reag. Ph. Eur., reag. ISO	agency suitable for SM 4500 - NH3, suitable for SM 5210	agency suitable for SM 4500 - NH3, suitable for SM 5210	agency -
Quality Level 200	Quality Level 200	Quality Level 200	Quality Level 200
form powder or crystals	form powder	form powder	form powder
pH 3.6-4.0 (20 °C, 4%)	pH 5.1 (25 °C, 1.8 g/L)	pH -	pH 8.2-10.1

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pictograms

GHS08

signalword

Danger

hcodes

H360FD

pcodes

P201 - P202 - P280 - P308 + P313 - P405 - P501

Hazard Classifications

Repr. 1B

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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Catanzaro EJ, et al.

Boric Acid: Isotopic and Assay Standard Reference Materials, 1-1 (1970)

One-pot synthesis of 3, 4-dihydropyrimidin-2(1H)-ones using boric acid as catalyst.

Tu S, et al.

Tetrahedron Letters, 44(32), 6153-6155 (2003)

In vitro activity of bergamot natural essence and furocoumarin-free and distilled extracts, and their associations with boric acid, against clinical yeast isolates.

L Romano et al.

The Journal of antimicrobial chemotherapy, 55(1), 110-114 (2004-12-03)

There is very little information, to date, on the antifungal activity of bergamot oil. In this study, we investigated the in vitro activity of three bergamot oils (natural essence, furocoumarin-free extract and distilled extract) against clinically relevant Candida species. We

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Global Trade Item Number

SKU	GTIN
31146-2.5KG	04061833636800
31146-500G	04061826681602
31146-6X1KG	04061835562220
31146-6X500G	04061833636817
31146-1KG	04061835562190
31146-6X2.5KG	04061835562237

Questions

1–2 of 2 Questions

Anonymous

10 months ago

How can I determine the shelf life / expiration / retest date of this product?

1 answer
1. Technical Support
  
  10 months ago
  
  If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
  For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
  For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
  For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
  
  Helpful?
Anonymous

a year ago

How is shipping temperature determined? And how is it related to the product storage temperature?

1 answer
1. Technical Support
  
  a year ago
  
  Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
  
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